Randomize selected vertex in Maya

def moveRandom(input):

    import random
    import maya.cmds as cmds
    s = cmds.ls(sl=True, fl =True)
    num = len(s)
    for i in range(num):
        cmds.select(s[i])
        r = random.random()
       
        h =r*input
        cmds.move( h, h, h, s[i], relative=True )